COHR vs KEYS: Correlation
Coherent Corp. (COHR) and Keysight Technologies (KEYS) show a moderate relationship: their 3-year correlation of weekly returns is 0.55.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COHR and KEYS?
Over the past 3 years, COHR and KEYS moved with a correlation of 0.55, which is moderate. Lately the two have drifted apart, with the 1-year correlation at 0.44 versus 0.55 over 3 years. Over 5 years the correlation is 0.55, and the annualized covariance of weekly returns is 1320.9 %².
By 3-year correlation, KEYS places #20 of the 41 assets tracked against COHR. Their recent paths diverged sharply: over the last 12 months COHR outperformed by 128.2 percentage points (+225.6% for COHR against +97.4% for KEYS). On a rolling one-year basis the correlation drifted between 0.41 and 0.72, a moderate band. Note the risk asymmetry: COHR runs 1.8 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
COHR vs KEYS: side by side
| COHR (Coherent Corp.) | KEYS (Keysight Technologies) | |
|---|---|---|
| 1-year return | +225.6% | +97.4% |
| 5-year return | +368.6% | +81.9% |
| Volatility (ann.) | 65.0% | 36.8% |
| Beta vs S&P 500 | 2.76 | 1.58 |
| Max drawdown (3Y) | -54.8% | -31.4% |
| Market cap | $57.8B | $55.5B |
| P/E (trailing) | 71.4 | 43.5 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | Information Technology | Information Technology |
Year-by-year returns
| Year | COHR | KEYS |
|---|---|---|
| 2022 | -48.6% | -17.2% |
| 2023 | +24.0% | -7.0% |
| 2024 | +117.6% | +1.0% |
| 2025 | +94.8% | +26.5% |
| 2026 | +60.0% | +60.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COHR and KEYS good diversifiers for each other?
Somewhat, no more. With 0.55 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between COHR and KEYS?
The COHR/KEYS correlation stands at 0.55 on a 3-year window (1 year: 0.44, 5 years: 0.55), computed from weekly returns as of 2026-08-27.
Is KEYS a good diversifier for COHR?
Somewhat, no more. With 0.55 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.55 mean?
On the −1 to +1 scale, 0.55 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/cohr-vs-keys.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cohr-vs-keys/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: COHR correlations · KEYS correlations
